In-situ temperature regulation of flexible supercapacitors by designing intelligent electrode with microencapsulated phase change materials

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

4 Scopus Citations
View graph of relations

Author(s)

  • Xiao-ying Xu
  • Xing Ouyang
  • Lifeng Cui
  • Jiaoling Hong
  • Xiao Meng
  • Siyin Qin
  • Jiaoning Tang

Detail(s)

Original languageEnglish
Article number135551
Journal / PublicationElectrochimica Acta
Volume334
Online published19 Dec 2019
Publication statusPublished - 20 Feb 2020
Externally publishedYes

Abstract

Benefiting from the on-going update of wearable electrical devices, flexible supercapacitors have attracted extensive attention in energy storage devices. However, the challenge still exists in achieving high electrochemical performance and cycling stability at high operating temperatures. Herein, an innovative in-situ thermal management system by rationally implanting microencapsulated phase change materials (MPCMs) into three-dimensional porous reduced graphene oxide/polyaniline (GP) frameworks on the surface of carbon nanotube film (CNF) was developed for flexible all-solid-state supercapacitors via facile one-pot electrochemical co-deposition method. The flexible sandwich-shaped all-solid-state supercapacitors using hybrid CNF/GP/MPCMs as electrodes and PVA-H2SO4 as the gel electrolyte were successfully assembled. The incorporation of MPCMs effectively suppressed the temperature fluctuation of the supercapacitor and promoted its operation stability at high temperatures. The supercapacitor containing MPCMs showed superior long-term cyclic stability in comparison with the counterpart without MPCMs. Moreover, the as-prepared supercapacitor was capable of enduring deformations of various angles and maintained 94.1% of the initial capacitance after 500 bending cycles, manifesting excellent mechanical performance. The study paves a feasible way of facilely constructing temperature regulation mechanism based on MPCMs for flexible high-performance supercapacitors.

Research Area(s)

  • Flexible supercapacitors, Phase change microcapsules, Polyaniline, Reduced graphene oxide, Thermal management

Citation Format(s)

In-situ temperature regulation of flexible supercapacitors by designing intelligent electrode with microencapsulated phase change materials. / Xu, Xiao-ying; Liu, Jia-hua; Ouyang, Xing; Cui, Lifeng; Hong, Jiaoling; Meng, Xiao; Qin, Siyin; Liu, Chen; Tang, Jiaoning; Chen, Da-Zhu.

In: Electrochimica Acta, Vol. 334, 135551, 20.02.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review